Do I still pay if my problem is not solved?

Solving your problem is my first priority, and I am every bit as invested in that as you are.

In the free initial call I get a picture of the situation and give you an estimate of the likely outcome and the time involved.

Because of the many technical complexities and unknowns involved, I cannot give a guarantee.

Unless we have expressly agreed otherwise, the rule is: time worked is time billed.